evalpoly.js (2142B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2018 The Stdlib Authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 /* 20 * This script compiles modules for evaluating polynomial functions. If any polynomial coefficients change, this script should be rerun to update the compiled files. 21 */ 22 'use strict'; 23 24 // MODULES // 25 26 var resolve = require( 'path' ).resolve; 27 var writeFileSync = require( '@stdlib/fs/write-file' ).sync; 28 var licenseHeader = require( '@stdlib/_tools/licenses/header' ); 29 var compile = require( './../../../../base/tools/evalpoly-compile' ); 30 31 32 // VARIABLES // 33 34 // Polynomial coefficients ordered in ascending degree... 35 var P = [ 36 3.999999999940941908e-01, // 3FD99999 9997FA04 37 2.222219843214978396e-01, // 3FCC71C5 1D8E78AF 38 1.531383769920937332e-01 // 3FC39A09 D078C69F 39 ]; 40 var Q = [ 41 6.666666666666735130e-01, // 3FE55555 55555593 42 2.857142874366239149e-01, // 3FD24924 94229359 43 1.818357216161805012e-01, // 3FC74664 96CB03DE 44 1.479819860511658591e-01 // 3FC2F112 DF3E5244 45 ]; 46 47 // Header to add to output files: 48 var header = licenseHeader( 'Apache-2.0', 'js', { 49 'year': ( new Date() ).getFullYear(), 50 'copyright': 'The Stdlib Authors' 51 }); 52 header += '\n/* This is a generated file. Do not edit directly. */\n'; 53 54 55 // MAIN // 56 57 /** 58 * Main execution sequence. 59 * 60 * @private 61 */ 62 function main() { 63 var fpath; 64 var opts; 65 var str; 66 67 opts = { 68 'encoding': 'utf8' 69 }; 70 71 fpath = resolve( __dirname, '..', 'lib', 'polyval_p.js' ); 72 str = header + compile( P ); 73 writeFileSync( fpath, str, opts ); 74 75 fpath = resolve( __dirname, '..', 'lib', 'polyval_q.js' ); 76 str = header + compile( Q ); 77 writeFileSync( fpath, str, opts ); 78 } 79 80 main();